<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
String url = request.getHeader("Referer");
String a = request.getParameter("a");
String b = request.getParameter("b");

System.out.println("a >>>> " + a + "          b>>>" + b);
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
로그인 페이지.
</body>
</html>